Hahn (Brooke Smith) doesn't like all the lesbo jokes that Mark (Eric Dane) is making to her. Callie (Sara Ramirez) 'fesses up that she told Mark about their new relationship. Hahn isn't happy with that because she likes to keep her personal life private. Not an unreasonable request, but nigh impossible if you work at this hospital.

Cristina and Lexie (Chyler Leigh) are assisting Derek with his patient, Headache Guy, today. Headache Guy has had a pain of 8 in his head for the past seven years. I recently had surgery, so I know that at hospitals, they measure pain on a 1 through 10 scale. I think a 5 is like a really bad headache that prevents you from concentrating and doing your work, so an 8 is pretty darn intense. Derek (Patrick Dempsey) bribes Cristina with surgical favors to Meredith that she wants Alex and Izzie to move out. This is in direct violation of the chief's new protocol, but whatever. Baby steps. Lexie has an idea about how to treat Headache Guy, but gets shot down to Cristina (also breaking the new rule), so she goes to Mark, who is apparently also an ENT. Wait, he's a plastic surgeon and an ENT? I'm just going to that go. Mark still ribs Lexie about her crush on George, which he calls pathetic. Anyway, it turns out that Lexie's idea about how to fix Headache Guy is right, so they don't have to do a frontal lobotomy on him after all. Phew! I hate it when they have to cut out the front of your brain! Cristina (Sandra Oh) is dumbfounded that Lexie could be right about anything.

The leaking pipes are getting worse and Richard (James Pickens Jr.) asks George for help, but he still hasn't started his exam. Instead of taking the exam, George offers to help like a dutiful lapdog.

Bailey (Chandra Wilson) and Meredith operate on Cancer Girl and find that her tumor is too extensive to take out. She'll have to have another round of chemotherapy. Trying to put on a brave face, Cancer Girl makes chit chat about Meredith's sex life.

At lunch, Meredith (Ellen Pompeo) tells Cristina that she quit her shrink, then Lexie, George and Alex sit down with them. There's a whole lot of just fun friends stuff in this scene, which makes me miss the good old days. Cristina says she has a high pain tolerance, and Alex decides to hit everyone. (Cristina doesn't flinch, but George (T.R. Knight) whimpers like a baby.) Lexie also reveals that she has a photographic memory, so Alex (Justin Chambers) calls her Lexiepedia.